Optimized initial vehicle modem connectivity search

1. A system comprising: a memory storing last-used frequency settings, protocol settings, and trip end data; and a processor of a telematics controller of a vehicle, programmed to responsive to the vehicle being powered from a parked state, set a period during which the vehicle attempts to reconnect per the last-used frequency settings and protocol settings without performing a full scan via a modem; and perform a full scan via the modem responsive to expiration of the period, wherein the trip end data indicates the period as one or more of (i) an amount of time expended from an abrupt attenuation of signal strength indicative of entering a structure until parking of the vehicle, or (ii) a distance traveled from the abrupt attenuation of signal strength indicative of entering the structure until the parking of the vehicle.

2. The system of claim 1 , wherein the last-used frequency settings include a primary frequency and a secondary frequency, and the protocol settings include neighbor frequencies.

3. A system comprising: a memory storing last-used frequency settings, protocol settings, and trip end data; and a processor of a telematics controller of a vehicle, programmed to responsive to the vehicle being powered from a parked state, set a period during which the vehicle attempts to reconnect per the last-used frequency settings and protocol settings without performing a full scan via a modem; perform a full scan via the modern responsive to expiration of the period; and to utilize dead reckoning based on vehicle speed and direction recorded in the trip end data to determine the period until the vehicle is likely to have exited the area of attenuated signal.

4. The system of claim 1 , wherein the full scan includes the processor directing the modem to scan all frequencies and technologies for service available to the modem.

5. A system comprising: a memory storing last-used frequency settings and protocol settings; and a processor of a telematics controller of a vehicle, programmed to responsive to the vehicle being powered from a parked state, set a period during which the vehicle attempts to reconnect per the last-used frequency settings and protocol settings without performing a full scan via a modem; perform a full scan via the modem responsive to expiration of the period; track local and wireless signal strength for the vehicle; and responsive to the signal strength being reduced due to a parking maneuver, store trip end data in the memory based on movements of the vehicle and store the last-used frequency settings and protocol settings based on current settings of a connection of the modem to a wide-area network.

6. A system comprising: a memory storing last-used frequency settings and protocol settings; and a processor of a telematics controller of a vehicle, programmed to responsive to the vehicle being powered from a parked state, set a period during which the vehicle attempts to reconnect per the last-used frequency settings and protocol settings without performing a full scan via a modem; perform a full scan via the modem responsive to expiration of the period; and identify a parking maneuver performed by the vehicle responsive to a rate of speed indicative of parking in combination with an attenuation of signal strength indicative of entering a structure.

7. A method comprising: responsive to identifying a parking maneuver, storing trip end data indicating movements of a vehicle and last-used frequency and protocol settings indicating current settings of a connection of a modem of the vehicle to a network; responsive to powering the vehicle from a parked state, setting a period during which the vehicle attempts to reconnect to the network per the current settings without a full scan; and performing a full scan responsive to expiration of the period.

8. The method of claim 7 , wherein the trip end data indicates the period as an amount of time expended from an abrupt attenuation of signal strength indicative of entering a structure until parking of the vehicle.

9. The method of claim 7 , wherein the trip end data indicates the period as a distance traveled from an abrupt attenuation of signal strength indicative of entering a structure until parking of the vehicle.

10. The method of claim 7 , further comprising utilizing dead reckoning based on vehicle speed and direction recorded in the trip end data to determine the period until the vehicle is likely to have exited the area of attenuated signal.

11. The method of claim 7 , wherein the full scan includes directing the modem to scan all frequencies and technologies for service available to the modem.

12. The method of claim 7 , further comprising identifying the parking maneuver responsive to a rate of speed indicative of parking in combination with an attenuation of signal strength indicative of entering a structure.

13. A non-transitory computer-readable medium comprising instructions that, when executed by a processor of a telematics controller of a vehicle, cause the controller to: store last-used frequency, protocol settings, and trip end data; and responsive to the vehicle being powered from a parked state, set a period during which the vehicle attempts to reconnect to the latest settings without performing a full scan via a modem; and perform a full scan via a modem responsive to expiration of the period, wherein the trip end data indicates the period as one or more of ii) an amount of time expended from an abrupt attenuation of signal strength indicative of entering a structure until parking of the vehicle, or (ii) a distance traveled from the abrupt attenuation of signal strength indicative of entering the structure until the parking of the vehicle.

14. A non-transitory computer-readable medium comprising instructions that, when executed by a processor of a telematics controller of a vehicle, cause the telematics controller to: store last-used frequency, protocol settings, and trip end data; responsive to the vehicle being powered from a parked state, set a period during which the vehicle attempts to reconnect to the latest settings without performing a full scan via a modem; and perform a full scan via a modem responsive to expiration of the period, utilize dead reckoning based on vehicle speed and direction recorded in the trip end data to determine the period until the vehicle is likely to have exited the area of attenuated signal.

15. The medium of claim 13 , wherein the full scan includes the processor directing the modem to scan all frequencies and technologies for service available to the modem.

16. A non-transitory computer-readable medium comprising instructions that, when executed by a processor of a telematics controller of a vehicle, cause the telematics controller to: store last-used frequency, protocol settings, and trip end data; responsive to the vehicle being powered from a parked state, set a period during which the vehicle attempts to reconnect to the latest settings without performing a full scan via a modem; perform a full scan via a modem responsive to expiration of the period; track local and wireless signal strength for the vehicle; and responsive to the signal strength being reduced due to a parking maneuver, store the trip end data based on movements of the vehicle and store the last-used frequency and protocol settings based on current settings of a connection of the modem to a wide-area network, the parking maneuver being identified responsive to a rate of speed indicative of parking in combination with an attenuation of signal strength indicative of entering a structure.